I like the "fort" idea but i wouldn't make them immobile just slow and sufficiently meaty that interceptors are a poor choice. Don't know about fewer freighters landing. I believe the point was more why is it stopping in random forest 248j when it has the demonstrated capacity to loop the planet/travel to another. Who signing for a freighter worth of goods in explodey purple jungle? Catching a freighter at some settlement no matter the dinkyness feels logically better.